Back to All Events

FOAM Meetup– A Proof of Location Protocol

  • Starfish Mission 1535 Mission Street San Francisco, CA, 94103 United States (map)


6:00 Networking
6:30 Speakers
• Talk 1: FOAM - Proof of Location Protocol (Ryan John King, FOAM)
8:00 End


About the Host
Starfish is a co-working space for the Blockchain Community to gather, work and learn together in San Francisco. They are hosting both established blockchain startups and companies and small teams at the ideation or development stage.

About the Sponsor (Food/Drink)
ConsenSys is a venture production studio building decentralized applications and various developer and end-user tools for blockchain ecosystems, focusing primarily on Ethereum.


Talk 1 – FOAM - Proof of Location Protocol

FOAM is an open Proof of Location protocol for decentralized, geospatial data markets. The protocol is designed to empower users to build a consensus-driven map of the world that can be trusted for every application. As technology evolves and changes, maps need to change too. FOAM secures physical space on the blockchain, harnessing the power of Ethereum with a cryptographic software utility token used to provide computational work and verification to the network.

Ryan John King, co-founder and CEO of FOAM, will walkthrough and demo the three elements of the protocol: the Crypto-Spatial Coordinate Location Encoding standard for smart contracts, the Spatial Index Visualizer, Token Curated Registries for points of interest and the type of consensus design needed for Proof of Location.

The Spatial Index is a visual blockchain explorer full stack react web-app built with purescript-web3, Haskell-web3, a REST API, mapbox-gl, Uber with native Metamask and uPort support. It is deployed with our purely functional alternative to Truffle, Chanterelle.

Developer Portal:
Chanterelle Read the Docs: